[1]The Twitter Universe was alive Sunday evening with a monster debate, watch the season finale of “Game of Thrones” or watch game two the NBA Final between the San Antonio Spurs and the Miami Heat.

Last Sunday’s shocking Game of Thrones episode, “The Rains of Castamere,” was HBO’s most social episode for any show in the history of the network, HBO told Mashable on Friday.

With more than 700,000 mentions on Twitter, Facebook, blogs, news sites and forums, online chatter about the episode surpassed the social buzz for HBO’s next two most social episodes: the season three premiere of Game of Thrones and the season five premiere of True Blood. HBO calculated mentions from Sunday at 7 p.m. EDT to Monday at 7 p.m.